56959987 has 4 divisors (see below), whose sum is σ = 65097136. Its totient is φ = 48822840.

The previous prime is 56959951. The next prime is 56959997. The reversal of 56959987 is 78995965.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78995965 = 5 ⋅15799193.

It is a cyclic number.

It is not a de Polignac number, because 56959987 - 2¹⁵ = 56927219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56959997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4068564 + ... + 4068577.

It is an arithmetic number, because the mean of its divisors is an integer number (16274284).

Almost surely, 2^56959987 is an apocalyptic number.

56959987 is a deficient number, since it is larger than the sum of its proper divisors (8137149).

56959987 is an equidigital number, since it uses as much as digits as its factorization.

56959987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8137148.

The product of its digits is 6123600, while the sum is 58.

The square root of 56959987 is about 7547.1840443970. The cubic root of 56959987 is about 384.7600393718.

The spelling of 56959987 in words is "fifty-six million, nine hundred fifty-nine thousand, nine hundred eighty-seven".